Weird sign and Test game

Clearly this sign has something to do with an UFO visiting Technion sometimes... Or may be it is bear on the walk.. anyhow this sign stands there for ages, confusing outside-world people about dwellers of the Tech...

P.s I want to run guessing "Know Technion" game. Which is still in test phase. If this experiment succeeds I will run it once or twice a week and even make a prize for a winner. So play and win :P ! I will announce right answer exactly in one week from now.
P.s Any answers in comments will be instantly deleted

So !
Can anyone guess where this particular sign is placed ?

Thanks to BumbleBee

Emergency Puzzle

Enough with the sad. Lets get back to usual TechnionFun stuff.
And this one is definitly our material. Ulmann on this floor does have 2 exits - on left and right - But strangely enough arrows of emergency exits pointing in opposite directions and meeting in the middle of the exact location of blue column.
I wonder do I have to be Harry Potter to be able to escape through the wall or did they intend to say that to escape Ulman and Tech I need to run my head against the wall ?

Invalid sign

I received it from Thalimenel. This was found at the side entrance of Ulmann.
While the picture is regular, the inscription leaves you in bewilderment. Whose bad joke was to write on that sign - "Wild animals" ?..

Kosher Lab

This little gem was found on the door of physics laboratory. On the first glance nothing strange is about it. But when you make a little bit closer inspection



You will understand a little weirdness in it.
Putting not cosher sandwich on the picture describing food that shouldnt been allowed inside the classroom feels somehow not right...